Bump rack from 2.2.8.1 to 2.2.9

Bumps [rack](https://github.com/rack/rack) from 2.2.8.1 to 2.2.9.
- [Release notes](https://github.com/rack/rack/releases)
- [Changelog](https://github.com/rack/rack/blob/main/CHANGELOG.md)
- [Commits](rack/rack@v2.2.8.1...v2.2.9)

---
updated-dependencies:
- dependency-name: rack
  dependency-type: indirect
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Gemfile.lock

@@ -537,7 +537,7 @@ GEM
     pundit (2.3.1)
       activesupport (>= 3.0.0)
     racc (1.7.3)
-    rack (2.2.8.1)
+    rack (2.2.9)
     rack-attack (6.7.0)
       rack (>= 1.0, < 4)
     rack-proxy (0.7.7)